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Meta · Language model

Muse Spark 1.2 Contributor

meta/muse-spark-1.2-contributor
  • Language
Released Aug 21, 2026

Muse Spark 1.2 contributor tier is a reasoning model from Meta designed for developers who want to start building at an even lower cost. It’s meaningfully cheaper than Muse Spark...

Specifications

Context window
1,048,576 tokens
Max output
943,718 tokens
Input
text, image, video, file
Output
text
Reasoning effort
xhigh, high, medium, low, minimal (always on)
Tokenizer
Other
Moderation
provider-moderated

Supported parameters

Accepted by the model and forwarded as-is by the gateway.

  • max_tokens
  • reasoning
  • reasoning_effort
  • repetition_penalty
  • response_format
  • structured_outputs
  • temperature
  • tool_choice
  • tools
  • top_k
  • top_p

Use it

POST /api/v1/chat/completions · MCP chat · full reference

curl https://omnirail.org/api/v1/chat/completions \
  -H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
  -d '{"model":"meta/muse-spark-1.2-contributor","messages":[{"role":"user","content":"Hello"}],"max_tokens":300}'